Roll src/third_party/skia/ 3befb84ef..e14349a75 (20 commits).

https://skia.googlesource.com/skia.git/+log/3befb84efc3d..e14349a7545e

$ git log 3befb84ef..e14349a75 --date=short --no-merges --format='%ad %ae %s'
2017-02-17 robertphillips Revert "Replace SkSpecialImage::makeTightSubset with asImage"
2017-02-17 mtklein Revert "Take missed opportunity: memset for A8."
2017-02-16 fmalita Fix drawVertices() texture mapping in the presence of a local matrix
2017-02-15 csmartdalton Check for GL_EXT_geometry_shader on ES
2017-02-16 senorblanco GrTessellator (AA): Performance tweaks and cleanup.
2017-02-16 bungeman Revert "GrTessellator (AA): Performance tweaks and cleanup."
2017-02-16 robertphillips Replace SkSpecialImage::makeTightSubset with asImage
2017-02-16 jvanverth Let DFPathRenderer accept smaller paths.
2017-02-16 bungeman Replace use of SkBitmap::eraseRGB with eraseColor.
2017-02-16 ethannicholas Fixed a couple of spots where sksl didn't have proper array support.
2017-02-10 herb Remove third_party/ktx from Skia.
2017-02-16 reed add device-clipping to gpudevice
2017-02-16 senorblanco GrTessellator (AA): Performance tweaks and cleanup.
2017-02-16 reed remove code for TextDecorations
2017-02-16 halcanary SkPDF/font subsetting: Use new version of SfntlyWrapper::SubsetFont
2017-02-16 mtklein SkJumper: everyone gets a start_pipeline().
2017-02-16 jvanverth Disable DFPathRenderTest for now.
2017-02-16 mtklein Take missed opportunity: memset for A8.
2017-02-16 mtklein SkJumper: fma() -> mad()
2017-02-16 jvanverth Fix DistanceFieldPathRenderer assert.

Created with:
  roll-dep src/third_party/skia
BUG=682918,682918

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, see:
http://www.chromium.org/developers/tree-sheriffs/sheriff-details-chromium#TOC-Failures-due-to-DEPS-rolls

CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel
TBR=bungeman@google.com

Review-Url: https://codereview.chromium.org/2701863002
Cr-Commit-Position: refs/heads/master@{#451323}

DEPS

@@ -40,7 +40,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.
-  'skia_revision': '3befb84efc3deba472849d76af96c6f56060b918',
+  'skia_revision': 'e14349a7545e7bd1e93f4c3095db8f481939b053',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.